There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

Can you count the number of blocks in the picture below?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

Rearrange the letters in "new door" to make one word.

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?